using System;
using System.Text;
using System.IO;

namespace YOLODetectProcessLib
{
    /// <summary>
    /// 日志类
    /// </summary>
    public class LogHelper
    {
        private static LogHelper logHelper = new LogHelper();
        private static DateTime _starTime;
        private static string _folder;
        private static volatile object _logLocker = new object();

        private static volatile object _errorLogLocker = new object();
        private static volatile object _warnLogLocker = new object();
        private static volatile object _infoLogLocker = new object();
        private static string _errorLogFileName = string.Empty;
        private static string _warnLogFileName = string.Empty;
        private static string _infoLogFileName = string.Empty;

        private LogHelper()
        {
#if ENABLE_AI_LOGS
            _folder = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "AILogs");
            if (!Directory.Exists(_folder))
            {
                Directory.CreateDirectory(_folder);
            }
#endif
        }

        /// <summary>
        /// info
        /// </summary>
        /// <param name="msg"></param>
        /// <param name="stackTrace"></param>
        public static void InfoLog(params string[] msgs)
        {
            Log(EnumLogType.InfoLog, msgs);
        }

        /// <summary>
        /// warn
        /// </summary>
        /// <param name="msg"></param>
        /// <param name="stackTrace"></param>
        public static void WarnLog(string msg, string stackTrace)
        {
            Log(EnumLogType.WarnLog, msg, stackTrace);
        }

        /// <summary>
        /// error
        /// </summary>
        /// <param name="msg"></param>
        /// <param name="stackTrace"></param>
        public static void ErrorLog(params string[] msgs)
        {
            Log(EnumLogType.ErrorLog, msgs);
        }

        /// <summary>
        /// fatal
        /// </summary>
        /// <param name="msg"></param>
        /// <param name="stackTrace"></param>
        public static void FatalLog(string msg, string stackTrace)
        {
            Log(EnumLogType.FatalLog, msg, stackTrace);
        }

        /// <summary>
        /// 记录
        /// </summary>
        /// <param name="ltype"></param>
        /// <param name="logs"></param>
        private static void Log(EnumLogType ltype, params string[] logs)
        {
#if ENABLE_AI_LOGS
            DateTime currentTime = DateTime.Now;
            if ((currentTime - _starTime).TotalDays >= 1)
            {
                lock (_errorLogLocker)
                {
                    _errorLogFileName = _folder + "\\" + currentTime.ToString("yyyyMMdd") + "_error.log";
                }
                lock (_warnLogLocker)
                {
                    _warnLogFileName = _folder + "\\" + currentTime.ToString("yyyyMMdd") + "_warn.log";
                }
                lock (_infoLogLocker)
                {
                    _infoLogFileName = _folder + "\\" + currentTime.ToString("yyyyMMdd") + "_info.log";
                }
                _starTime = currentTime;
            }
            string msg = DateTime.Now.ToString("yyyyMMdd_hhmmss_fffff ") + string.Join("\n", logs);
            switch (ltype)
            {
                case EnumLogType.InfoLog:
                    lock (_infoLogLocker)
                    {
                        WriteLog(_infoLogFileName, msg);
                    }
                    break;
                case EnumLogType.WarnLog:
                    lock (_infoLogLocker)
                    {
                        WriteLog(_warnLogFileName, msg);
                    }
                    break;
                case EnumLogType.ErrorLog:
                    lock (_infoLogLocker)
                    {
                        WriteLog(_errorLogFileName, msg);
                    }
                    break;
                case EnumLogType.FatalLog:
                    lock (_infoLogLocker)
                    {
                        WriteLog(_errorLogFileName, msg);
                    }
                    break;
            }
#endif
        }

        private static void WriteLog(string fileName, string msg)
        {
            StreamWriter sw = new StreamWriter(fileName, true, Encoding.Default);
            sw.WriteLine(msg);
            sw.Flush();
            sw.Close();
        }
    }

}